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`"UNITED STATES PATENT CFFICE.

ELLIOT SAVAGE, OF EAST BERLIN, CONNECTICUT.

MACHINE FOR CUTTING AND BENDING SHEET METAL.

Specification of letters Patent N o. 16,853, dated March 17, 18157.

To all whom may concern.'

Be it known that I, ELLIOT SAVAGE, of East Berlin, in the county ofHartford and State of Connecticut, have invented an Improved Machine forCut-ting a Circular Plate from a Sheet of Metal and for Bending the Edgeof said Plate; and I do hereby declare that the same is fully describedand represented in the following specification and the accompanyingdrawings, of which- Figure l, denotes a top view of the said machine;Fig. 2, a front elevation of it. Fig. 3, a rear elevation. Fig. 4:, aninner side view of the movable compound lever and its bending rollers,the same being hereinafter, explained. Fig. 5, is a vertical, centraland longitudinal section of the machine, such section being taken so asto represent the compound bending lever as moved backward and having itslever arm raised into a vertical position. In these drawings, A, denotesthe cutter frame, while, B, exhibits the frame for supporting andcarrying the clamps and bending rollers. Each of these frames is formedsomewhat like the letter U, except in respect to the frame A, one parta, of said frame extending beyond the other part, b, thereof, as shownin Figs. l, 2 and 6, and for the purpose of Vreceiving upon it, andsupport-ing the frame B, which is placed thereon as shown in thedrawings.

Figs. 6 and 7 represent separate top views of the frames A, B, as theyappear when divested of the mechanism applied to them. While the frameA, rests on three legs C, C, C, the frame B, is upheld by said frame A,and by a single leg I), extending down from it as shown in Fig. 2. Slotsc, c, and CZ, are made through the frames A, and B, as seen in Figs. 6and 7, the two frames being held together by two clamp screws and nutsas shown at E, E, in Figs. l and 5, the latter screw F, being made topass through a sliding or bearing carriage G, arranged on the frame B,as seen in Figs. l and 5.

From the above it will be seen that the front parts or arms of the twoframes A, and B, are entirely disconnected, the two frames beingconnected by their rearvarms or parts and the connections being of sucha nature as to permit the frame B, to be moved longitudinally on theframe A, Ain order to adjust the distance of the axis of the clamps fromthe cutters, as occasion may require, the said clamps and cutters beingshown `at H, I, and K, L. The clamp I-I, is carried by a rotary shaft e,on which there is a crank, j'. So in regard to the clamp, I, it issupported in the usual way upon a rotary shaft, g, which is moved orforced toward the shaft, e, by power acting through a cam lever, 7L,arranged as shown in Figs. l and 3.

In respect to the rotary cutters, K, L, they are applied to the frame,A, as shown in the drawings, that is in the nia-nner in which they aregenerally applied to the bows and frames of like machines for cuttingsheet metal into circular disks, the sheet of metal to be out beingplaced between the clamps, and so that its edge shall come into the biteor angle of the cutting edges of the cutters. As, in order to hold thesheet of metal securely, the clamp I, has to be forced with great powertoward the clamp H, it does no-t in my machine spring the cutters apartfrom one another,` as is the casein other machines, where the clampframe is so aiiixed tothe cutter frame 'as to cause such a separat-ionof the cutters to occur during the operation of ccnlining a sheet ofmetal between the clamps. In case, the cutters are moved asunder ortheir true relations disturbed, their operation on the metal will beeifected more or less injuriously. Therefore I have so constructed thetwo frames A, and B, and applied them together, that while one may bemoved on the other in a longitudinal direction so as to adjust thedistance of the clamps from the cutters, the operation of fixing a sheetof metal between the clamps, shall not spring the cutters apart from oneanother. .y

The bending rollers, which are for the purpose of turning down thecircular edge of the disk of metal after it has been cut from a sheet,are shown at M, N, C, the innerl of said rollers, viz., that marked M,being aflixed to an auxiliary rotary shaft, z', carrying a crank 7c, onits outer end, as shown in Figs. l, and 2. By means of said shaft andcrank, the roller M, may be put in rotation so as to cause the disk tobe revolved by power acting at its circumference, instead of near itscenter it being customary in most other machines of a like nature, torotate the disks by revolving the clamps. Under these lattercircumstances, the strain and leverage on the disk is very great, somuch so, as often to cause it to slip between the clamps, whereby, thesurface or surfaces against which they may be in Contact, may becomemarred, injured or defaced. The other rollers, N, and O, are carried bya compound or jointed lever, I), the same consisting of a bent lever, Z,hinged or jointed to an arm, m, that turns horizontally on a screw pin,n, screwed into some one of a series of screw holes, o, 0, 0, arrangedin the sliding carriage, Gr, as seen in Fig. l. The object of suchseries of screw holes is to enable the roller, O, carried by the arm m,to be adjust-ed in its angular position with reference to the plane ofthe roller M. The roller, O, is carried by the lesser arm of the leverZ, it being arranged with respect to the same as shown in Fig. 5.

By constructing the compound lever in the manner described, we areenabled not only to turn it horizontally so as to move ythe roller, N,either toward or away from the roller, M, but we may move the roller, O,either toward or away from either or both of said rollers as occasionmay require. Each of the said bending rollers is made frusto conical andin other respects as represented in the drawings. In operating with myimproved machine, the sheet of metal, while being cut in the form of adisk, is rotated by power applied to the crank f. The bending down ofthe edge of the disk is eiiiected by the action of the bending rollers,the workman or attendant operating the compound lever with his lefthand, while with his right hand he turns the crank of the shaft of theroller M. In this way he can raise a lip on the periphery of the disk,such lip being yeither at a right angle to the plane of the metal disk,or at such an obtuse, or such an acute angle thereto as circumstancesmay require. A scale of divisions may be applied 'to the frame, A, asseen at S, the same being for convenience of adjustment of the distancebetween the clamps and cutters.

I do not claim so applying the clamps and cutters to separate frames ora bow and half bow that the cutters jointly may be moved either towardor away from the clamps without any disturbance of the positions of thecutters relatively to one another; but

IVhat I do claim isl. Constructing and arranging the frame which carriesthe clamps with respect to that which carries the cutters substantiallyas described, that is so that while the clamps are being forced togetheror made to seize a plate of metal, they shall not spread the cuttersapart.

2. I also claim the mode of constructing the compound lever of thebending rollers, and arranging the rollers thereon, the said compoundlever being composed of a bent lever and an arm, and the rollers beingapplied to them respectively in manner as above explained.

3. I also claim combining with the clamps, their crank shaft, and thebending rollers, the auxiliary crank shaft or equivalent means by which,the bending roller M, may be rotated, independent-ly of force appliedthrough the clamps, and so that the middle of the metallic plate shallnot be subjected to injurious strains by the bending rollers.

In testimony whereof, I have hereunto set my signature this thirteenthday of January A. D. 1857.

ELLIOT SAVAGE.

Vitnesses:

GEORGE L. DIcKINsoN, JONATHAN BARNES.

